Oberon just wants the boy because the boy is very "beautiful." For whatever reason, that makes him want the boy to be a "knight of his train." This means that he wants the boy to be one of his followers. It appears that Oberon and Titania are just using the boy as an excuse to quarrel.
The choice to have the characters voices provided by actors offstage
Mercutio mocks love, reducing Romeo's supposed love for Rosaline.
there are multiple meanings.
Mercutio humorously compares Romeo to an ape in this metaphor (2.1.14)
Answers: One or more children and unhappiness about darkness.
